7-Letter Words That Start with O for Kids - List of Essential Vocabulary Words

Let's have a picnic outside in the park.

We can play on the swing set outside.

Mommy and Daddy like to garden outside.

Oatmeal is made from oats and is good for your tummy.

You can add cinnamon and honey to make your oatmeal taste yummy.

For breakfast, I like to eat warm oatmeal with fruit on top.

We love playing outdoor games like tag and hide-and-seek.

I brought my bucket and shovel to play in the outdoor sandbox.

In the outdoor playground, there are slides and swings to play on.

The police officer helps keep our community safe.

The officer wore a shiny badge on his uniform.

At Career Day, we learned about what an officer does to help people.

The fairytale started with "Once upon a time" to set the scene for the opening of the story.

I carefully unwrapped the present, excited to see what was inside the beautifully wrapped opening.

The teacher asked us to raise our hands when we want to say something during the class opening.

Ostriches have long legs and can run very fast to escape from danger.

The ostrich is the biggest bird in the world, and it cannot fly.

An ostrich has a long neck that helps it reach leaves on trees to eat.

We need to use scissors to operate the craft project.

The doctor will operate on your broken arm to make it better.

My dad knows how to operate the remote control for the TV.

In the orchard, you can see trees blooming with fruits like apples, oranges, and pears.

We went to the orchard to pick apples and tasted their sweet juice.

The apple orchard is a place where many trees grow apples.

During the game, the coach explained the importance of teamwork in executing a strong offense.

Scoring a goal in soccer is an exciting offense that helps your team win the game.

In basketball, passing the ball effectively is crucial for a successful offense.

In our class, we shared our opinion on which book we liked the most.

Everyone has their own opinion about which flavor of ice cream is the best.

When writing a persuasive essay, it's important to include your opinion and supporting reasons.

My mom always asks me to tidy up my room so that it looks neat and orderly.

Our teacher likes it when we line up in an orderly fashion.

To keep our classroom tidy, we put our books in an orderly manner on the shelf.

Being an outcast means feeling left out or different from the rest of the group.

Sometimes, being an outcast can lead to discovering unique talents and strengths that set you apart.

The outcast boy found solace in his books, where he could escape into exciting adventures.

The teacher asked us to create an outline before writing our book reports.

Before writing an essay, it's helpful to create an outline to organize your thoughts.

I used a pencil to draw an outline of the mountains in my art project.

Scientists use telescopes to observe stars and planets in the night sky.

During our field trip to the zoo, we were able to observe a wide variety of animals and learn about their behaviors.

We could observe different plants in the garden to see how they grow.

If you wear a raincoat when it's raining, it's obvious that you'll stay dry.

The answer was so obvious, everyone knew it right away.

It's obvious that the sky is blue and grass is green.

In some countries, littering in public places is considered a serious offence with fines.

Forgetting to say "thank you" can sometimes be seen as a minor social offence.

Scoring a goal against the opponent's team is considered an offence in soccer.

When rolling a dice, the outcome could be any number from 1 to 6.

The outcome of a math problem is the answer or result you get after solving it.

In a game, the outcome of a move can determine whether you win or lose.

The mayor's decision to cut funding for the playground caused outrage among parents and children.

The community expressed outrage over the pollution in the local river.

There was outrage among the students when the school canceled the field trip.

The forest was overrun with playful squirrels gathering acorns for the winter.

The garden was overrun with colorful flowers, attracting butterflies and bees.

During the picnic, the park was overrun by a group of excited children playing tag.

We used odorous markers to make our artwork smell like different fruits.

The flowers in the garden have a sweet and odorous fragrance.

The gym locker room can sometimes be odorous after a workout.

Emily's positive outlook on life always brightens up the room.

Ryan believes that having a good outlook can help you achieve your goals.

The weather forecast gives us an outlook on what to expect tomorrow.

In the library, she found an obscure book that no one had checked out in years.

The explorer stumbled upon an obscure cave hidden deep in the jungle.

The meaning of the ancient symbol was so obscure that even the historians were puzzled.

The oculist recommended regular eye check-ups to maintain good eye health.

The oculist prescribed glasses to improve the student's vision in class.

At the oculist's office, the eye doctor conducted a thorough examination of the patient's eyes.

The news reported on a new military outpost being built near the border for security purposes.

The remote outpost in the mountains served as a base for hikers exploring the wilderness.

The astronauts established a small outpost on the moon to conduct experiments and research.

During the field trip, the park ranger will oversee the group to ensure everyone stays safe and together.

A librarian may oversee the library, making sure books are organized and available for borrowing.

The teacher will oversee the science experiment to ensure everyone follows safety rules.

She used an oblique strategy to solve the challenging math problem.

The detective followed an oblique trail of evidence to catch the thief.

The oblique lines in the painting created a sense of movement and depth.

The detective felt an ominous presence as he entered the crime scene.

The eerie silence in the haunted house was quite ominous.

The dark clouds and thunder made the atmosphere feel ominous.

In history class, we learned about how different groups have been oppressed throughout the centuries.

The authoritarian government implemented strict rules to oppress dissenting voices.

The dictator used his power to oppress the people, taking away their freedom.

Doing household chores every day can become an onerous responsibility.

Studying for multiple exams all in one day can be an onerous task.

Having to complete a long and complex project can feel onerous and overwhelming.

The politician practiced his oration before the important speech.

The historical figure's famous oration inspired many people to fight for freedom.

The student delivered a powerful oration about the importance of recycling.

The opulent mansion boasted a private cinema and a luxurious indoor pool.

The grand ballroom was filled with opulent decorations and chandeliers.

The queen's opulent attire adorned with diamonds and pearls dazzled everyone in the room.

She won the oratory competition by delivering a powerful speech on climate change.

The candidate's oratory skills captivated the audience during the political debate.

Due to its rare sightings and deep-sea habitat, the oarfish has inspired various myths and legends.

Marine biologists study the oarfish to learn more about its behavior and ecological role in the ocean.

The oarfish, a long and slender marine fish, can grow up to 36 feet in length.

An octopus can change its colors to blend with its surroundings.

I saw a colorful octopus at the aquarium.

The octopus has eight long tentacles.

Oilfish, also known as escolar, is a type of fish with a high oil content that can cause gastrointestinal issues in some people.

When cooking oilfish, it's important to remove excess oil to minimize the risk of digestive discomfort.

Despite its delicious taste, oilfish should be consumed in moderation due to its potential side effects.

The opaleye fish gets its name from the beautiful opalescent sheen on its scales.

Opaleye fish are commonly found in rocky coastal areas along the Pacific Ocean.

The opaleye's diet consists of algae, small invertebrates, and crustaceans.

Opossums are known for their ability to play dead when they feel threatened by predators.

The opossum is a marsupial that carries its babies in a pouch on its belly.

Did you know that opossums are skilled climbers and can use their prehensile tails to grasp branches?

The ostrich is the biggest bird in the world and it can run very fast.

Even though ostriches have wings, they cannot fly, but they can use their legs to kick.

Ostriches have long necks and legs, and they live in Africa where it's very hot.

The police found suspicious objects near the crime scene, leading to further investigation.

In math, objects can be geometric shapes like cubes, spheres, or pyramids.

The museum displayed ancient objects, including pottery, jewelry, and tools, for visitors to admire.

The new playground design includes an octagon-shaped sandbox for children to play in.

An octagon is a shape with eight sides and eight angles, like a stop sign.

In math class, we learned that an octagon has twice as many sides as a square.

When we roll a dice, each number that comes up is a possible outcome.

Finding the outcome of a subtraction problem helps us understand how much money we have left after spending.

In our math game, the outcome of adding two numbers tells us how many steps to move forward.

During the economic analysis, the economist identified an outlier that skewed the average income calculation.

In statistics, an outlier is a data point that significantly differs from other observations in a dataset.

The weather forecast showed an outlier in temperature, indicating a sudden and unexpected heatwave.

During the Industrial Revolution, factory owners sought optimal ways to increase productivity and profits.

To achieve optimal results in battle, military commanders strategize and plan meticulously.

In historical negotiations, finding an optimal solution often requires compromise and diplomacy.